1. Earth is the only known planet capable of supporting life. It has the necessary conditions like a temperature range conducive to liquid water, abundant water, and other elements essential for life like carbon and oxygen.
2. Life plays a crucial role in regulating Earth's climate and atmosphere. Plants and algae produce oxygen and absorb carbon dioxide, keeping temperatures stable.
3. All of humanity relies on Earth's living systems like forests and oceans for survival. We depend on ecosystems for food, medicine, clean air and water. The extinction of species threatens our own existence on the planet.